array_intersect:根据值计算多个数组的交集

1. [代码]array_intersect    

$arr1 = ['a'=>'aaa','b'=>'bbb','c'=>'ccc'];
$arr2 = ['bb'=>'ccc','dd'=>'aaa'];
$arr = array_intersect($arr1, $arr2);

echo '<pre>';
print_r($arr);

result:
Array
(
    [a] => aaa
    [c] => ccc
)